Pheonix ReBuilders News<br/>Diagnostic systems<wbr/><br/><wbr/><br/>Engine<wbr/>On Board Diagnostics (also known as OBD) is a computerized system that allows for electronic diagnosis of a vehicles' powerplant. The first generation, known as OBD1, was introduced 10 years after the U.S. Congress passed the Clean Air Act in 1970 as a way to monitor a vehicles' fuel injection system. OBD2, the second generation of computerized on-board diagnostics, was codified and recommended by the California Air Resource Board in 1994 and became mandatory equipment aboard all vehicles sold in the United States as of 1996.<wbr/><br/><wbr/><br/>Superchargers<wbr/>and turbochargers<wbr/><br/><wbr/><br/>A<wbr/>supercharger is a "forced induction" system which uses a compressor powered by the shaft of the engine which forces air through the valves of the engine to achieve higher flow. When these systems are employed the maximum absolute pressure at the inlet valve is typically around 2 times atmospheric pressure or more.<br/>A cutaway of a turbocharger<wbr/><br/><wbr/><br/>Turbochargers<wbr/>are another type of forced induction system which has its compressor powered by a gas turbine running off the exhaust gases from the engine.<wbr/><br/><wbr/><br/>Turbochargers<wbr/>and superchargers are particularly useful at high altitudes and they are frequently used in aircraft engines.<wbr/><br/><wbr/><br/>Duct<wbr/>jet engines use the same basic system, but eschew the piston engine, and replace it with a burner instead.<wbr/><br/><wbr/><br/>Pheonix<wbr/>ReBuilders News :Piston engine valves<br/><br/>In piston engines, the valves are grouped into 'inlet valves' which admit the entrance of fuel and air and 'outlet valves' which allow the exhaust gases to escape. Each valve opens once per cycle and the ones that are subject to extreme accelerations are held closed by springs that are typically opened by rods running on a camshaft rotating with the engines' crankshaft.<wbr/><br/><wbr/><br/>Pheonix<wbr/>ReBuilders Comapny<br/>Diesel cycle<br/>P-v Diagram for the Ideal Diesel cycle. The cycle follows the numbers 1-4 in clockwise direction.<wbr/><br/><wbr/><br/>Most<wbr/>truck and automotive diesel engines use a cycle reminiscent of a four-stroke cycle, but with a compression heating ignition s
